modules/gui/qt4/components/interface_widgets.cpp

   1 /*****************************************************************************
   2  * interface_widgets.cpp : Custom widgets for the main interface
   3  ****************************************************************************
   4  * Copyright (C) 2006-2010 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *          Jean-Baptiste Kempf <jb@videolan.org>
   9  *          Rafaël Carré <funman@videolanorg>
  10  *          Ilkka Ollakka <ileoo@videolan.org>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * ( at your option ) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  25  *****************************************************************************/
  26
  27 #ifdef HAVE_CONFIG_H
  28 # include "config.h"
  29 #endif
  30
  31 #include "components/interface_widgets.hpp"
  32 #include "dialogs_provider.hpp"
  33 #include "util/customwidgets.hpp"               // qtEventToVLCKey, QVLCStackedWidget
  34
  35 #include "menus.hpp"             /* Popup menu on bgWidget */
  36
  37 #include <vlc_vout.h>
  38
  39 #include <QLabel>
  40 #include <QToolButton>
  41 #include <QPalette>
  42 #include <QEvent>
  43 #include <QResizeEvent>
  44 #include <QDate>
  45 #include <QMenu>
  46 #include <QWidgetAction>
  47 #include <QDesktopWidget>
  48 #include <QPainter>
  49 #include <QTimer>
  50 #include <QSlider>
  51 #include <QBitmap>
  52
  53 #ifdef Q_WS_X11
  54 #   include <X11/Xlib.h>
  55 #   include <qx11info_x11.h>
  56 #endif
  57
  58 #include <math.h>
  59 #include <assert.h>
  60
  61 /**********************************************************************
  62  * Video Widget. A simple frame on which video is drawn
  63  * This class handles resize issues
  64  **********************************************************************/
  65
  66 VideoWidget::VideoWidget( intf_thread_t *_p_i )
  67             : QFrame( NULL ) , p_intf( _p_i )
  68 {
  69     /* Set the policy to expand in both directions */
  70     // setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
  71
  72     layout = new QHBoxLayout( this );
  73     layout->setContentsMargins( 0, 0, 0, 0 );
  74     stable = NULL;
  75     show();
  76 }
  77
  78 VideoWidget::~VideoWidget()
  79 {
  80     /* Ensure we are not leaking the video output. This would crash. */
  81     assert( !stable );
  82 }
  83
  84 void VideoWidget::sync( void )
  85 {
  86 #ifdef Q_WS_X11
  87     /* Make sure the X server has processed all requests.
  88      * This protects other threads using distinct connections from getting
  89      * the video widget window in an inconsistent states. */
  90     XSync( QX11Info::display(), False );
  91 #endif
  92 }
  93
  94 /**
  95  * Request the video to avoid the conflicts
  96  **/
  97 WId VideoWidget::request( int *pi_x, int *pi_y,
  98                           unsigned int *pi_width, unsigned int *pi_height,
  99                           bool b_keep_size )
 100 {
 101     msg_Dbg( p_intf, "Video was requested %i, %i", *pi_x, *pi_y );
 102
 103     if( stable )
 104     {
 105         msg_Dbg( p_intf, "embedded video already in use" );
 106         return 0;
 107     }
 108     if( b_keep_size )
 109     {
 110         *pi_width  = size().width();
 111         *pi_height = size().height();
 112     }
 113
 114     /* The owner of the video window needs a stable handle (WinId). Reparenting
 115      * in Qt4-X11 changes the WinId of the widget, so we need to create another
 116      * dummy widget that stays within the reparentable widget. */
 117     stable = new QWidget();
 118     QPalette plt = palette();
 119     plt.setColor( QPalette::Window, Qt::black );
 120     stable->setPalette( plt );
 121     stable->setAutoFillBackground(true);
 122     /* Indicates that the widget wants to draw directly onto the screen.
 123        Widgets with this attribute set do not participate in composition
 124        management */
 125     /* This is currently disabled on X11 as it does not seem to improve
 126      * performance, but causes the video widget to be transparent... */
 127 #ifndef Q_WS_X11
 128     stable->setAttribute( Qt::WA_PaintOnScreen, true );
 129 #endif
 130
 131     layout->addWidget( stable );
 132
 133 #ifdef Q_WS_X11
 134     /* HACK: Only one X11 client can subscribe to mouse button press events.
 135      * VLC currently handles those in the video display.
 136      * Force Qt4 to unsubscribe from mouse press and release events. */
 137     Display *dpy = QX11Info::display();
 138     Window w = stable->winId();
 139     XWindowAttributes attr;
 140
 141     XGetWindowAttributes( dpy, w, &attr );
 142     attr.your_event_mask &= ~(ButtonPressMask|ButtonReleaseMask);
 143     XSelectInput( dpy, w, attr.your_event_mask );
 144 #endif
 145     sync();
 146 #ifndef NDEBUG
 147     msg_Dbg( p_intf, "embedded video ready (handle %p)",
 148              (void *)stable->winId() );
 149 #endif
 150     return stable->winId();
 151 }
 152
 153 /* Set the Widget to the correct Size */
 154 /* Function has to be called by the parent
 155    Parent has to care about resizing itself */
 156 void VideoWidget::SetSizing( unsigned int w, unsigned int h )
 157 {
 158     resize( w, h );
 159     emit sizeChanged( w, h );
 160     /* Work-around a bug?misconception? that would happen when vout core resize
 161        twice to the same size and would make the vout not centered.
 162        This cause a small flicker.
 163        See #3621
 164      */
 165     if( size().width() == w && size().height() == h )
 166         updateGeometry();
 167     sync();
 168 }
 169
 170 void VideoWidget::release( void )
 171 {
 172     msg_Dbg( p_intf, "Video is not needed anymore" );
 173
 174     assert( stable );
 175     layout->removeWidget( stable );
 176     stable->deleteLater();
 177     stable = NULL;
 178
 179     updateGeometry();
 180 }
 181
 182 /**********************************************************************
 183  * Background Widget. Show a simple image background. Currently,
 184  * it's album art if present or cone.
 185  **********************************************************************/
 186
 187 BackgroundWidget::BackgroundWidget( intf_thread_t *_p_i )
 188                  :QWidget( NULL ), p_intf( _p_i ), b_expandPixmap( false )
 189 {
 190     /* A dark background */
 191     setAutoFillBackground( true );
 192     QPalette plt = palette();
 193     plt.setColor( QPalette::Active, QPalette::Window , Qt::black );
 194     plt.setColor( QPalette::Inactive, QPalette::Window , Qt::black );
 195     setPalette( plt );
 196
 197     /* Init the cone art */
 198     updateArt( "" );
 199
 200     CONNECT( THEMIM->getIM(), artChanged( QString ),
 201              this, updateArt( const QString& ) );
 202 }
 203
 204 void BackgroundWidget::updateArt( const QString& url )
 205 {
 206     if ( !url.isEmpty() )
 207     {
 208         pixmapUrl = url;
 209     }
 210     else
 211     {   /* Xmas joke */
 212         if( QDate::currentDate().dayOfYear() >= 354 )
 213             pixmapUrl = QString( ":/logo/vlc128-christmas.png" );
 214         else
 215             pixmapUrl = QString( ":/logo/vlc128.png" );
 216     }
 217     update();
 218 }
 219
 220 void BackgroundWidget::paintEvent( QPaintEvent *e )
 221 {
 222     int i_maxwidth, i_maxheight;
 223     QPixmap pixmap = QPixmap( pixmapUrl );
 224     QPainter painter(this);
 225     QBitmap pMask;
 226     float f_alpha = 1.0;
 227
 228     i_maxwidth = std::min( maximumWidth(), width() ) - MARGIN * 2;
 229     i_maxheight = std::min( maximumHeight(), height() ) - MARGIN * 2;
 230
 231     if ( height() > MARGIN * 2 )
 232     {
 233         /* Scale down the pixmap if the widget is too small */
 234         if( pixmap.width() > i_maxwidth || pixmap.height() > i_maxheight )
 235         {
 236             pixmap = pixmap.scaled( i_maxwidth, i_maxheight,
 237                             Qt::KeepAspectRatio, Qt::SmoothTransformation );
 238         }
 239         else
 240         if ( b_expandPixmap &&
 241              pixmap.width() < width() && pixmap.height() < height() )
 242         {
 243             /* Scale up the pixmap to fill widget's size */
 244             f_alpha = ( (float) pixmap.height() / (float) height() );
 245             pixmap = pixmap.scaled(
 246                     width() - MARGIN * 2,
 247                     height() - MARGIN * 2,
 248                     Qt::KeepAspectRatio,
 249                     ( f_alpha < .2 )? /* Don't waste cpu when not visible */
 250                         Qt::SmoothTransformation:
 251                         Qt::FastTransformation
 252                     );
 253             /* Non agressive alpha compositing when sizing up */
 254             pMask = QBitmap( pixmap.width(), pixmap.height() );
 255             pMask.fill( QColor::fromRgbF( 1.0, 1.0, 1.0, f_alpha ) );
 256             pixmap.setMask( pMask );
 257         }
 258
 259         painter.drawPixmap(
 260                 MARGIN + ( i_maxwidth - pixmap.width() ) /2,
 261                 MARGIN + ( i_maxheight - pixmap.height() ) /2,
 262                 pixmap);
 263     }
 264     QWidget::paintEvent( e );
 265 }
 266
 267 void BackgroundWidget::contextMenuEvent( QContextMenuEvent *event )
 268 {
 269     QVLCMenu::PopupMenu( p_intf, true );
 270     event->accept();
 271 }
 272
 273 #if 0
 274 #include <QPushButton>
 275 #include <QHBoxLayout>
 276
 277 /**********************************************************************
 278  * Visualization selector panel
 279  **********************************************************************/
 280 VisualSelector::VisualSelector( intf_thread_t *_p_i ) :
 281                                 QFrame( NULL ), p_intf( _p_i )
 282 {
 283     QHBoxLayout *layout = new QHBoxLayout( this );
 284     layout->setMargin( 0 );
 285     QPushButton *prevButton = new QPushButton( "Prev" );
 286     QPushButton *nextButton = new QPushButton( "Next" );
 287     layout->addWidget( prevButton );
 288     layout->addWidget( nextButton );
 289
 290     layout->addStretch( 10 );
 291     layout->addWidget( new QLabel( qtr( "Current visualization" ) ) );
 292
 293     current = new QLabel( qtr( "None" ) );
 294     layout->addWidget( current );
 295
 296     BUTTONACT( prevButton, prev() );
 297     BUTTONACT( nextButton, next() );
 298
 299     setLayout( layout );
 300     setMaximumHeight( 35 );
 301 }
 302
 303 VisualSelector::~VisualSelector()
 304 {}
 305
 306 void VisualSelector::prev()
 307 {
 308     char *psz_new = aout_VisualPrev( p_intf );
 309     if( psz_new )
 310     {
 311         current->setText( qfu( psz_new ) );
 312         free( psz_new );
 313     }
 314 }
 315
 316 void VisualSelector::next()
 317 {
 318     char *psz_new = aout_VisualNext( p_intf );
 319     if( psz_new )
 320     {
 321         current->setText( qfu( psz_new ) );
 322         free( psz_new );
 323     }
 324 }
 325 #endif
 326
 327 SpeedLabel::SpeedLabel( intf_thread_t *_p_intf, QWidget *parent )
 328            : QLabel( parent ), p_intf( _p_intf )
 329 {
 330     tooltipStringPattern = qtr( "Current playback speed: %1\nClick to adjust" );
 331
 332     /* Create the Speed Control Widget */
 333     speedControl = new SpeedControlWidget( p_intf, this );
 334     speedControlMenu = new QMenu( this );
 335
 336     QWidgetAction *widgetAction = new QWidgetAction( speedControl );
 337     widgetAction->setDefaultWidget( speedControl );
 338     speedControlMenu->addAction( widgetAction );
 339
 340     /* Change the SpeedRate in the Status Bar */
 341     CONNECT( THEMIM->getIM(), rateChanged( float ), this, setRate( float ) );
 342
 343     DCONNECT( THEMIM, inputChanged( input_thread_t * ),
 344               speedControl, activateOnState() );
 345     setRate( var_InheritFloat( p_intf, "rate" ) );
 346 }
 347
 348 SpeedLabel::~SpeedLabel()
 349 {
 350     delete speedControl;
 351     delete speedControlMenu;
 352 }
 353
 354 /****************************************************************************
 355  * Small right-click menu for rate control
 356  ****************************************************************************/
 357
 358 void SpeedLabel::showSpeedMenu( QPoint pos )
 359 {
 360     speedControlMenu->exec( QCursor::pos() - pos
 361                           + QPoint( 0, height() ) );
 362 }
 363
 364 void SpeedLabel::setRate( float rate )
 365 {
 366     QString str;
 367     str.setNum( rate, 'f', 2 );
 368     str.append( "x" );
 369     setText( str );
 370     setToolTip( tooltipStringPattern.arg( str ) );
 371     speedControl->updateControls( rate );
 372 }
 373
 374 /**********************************************************************
 375  * Speed control widget
 376  **********************************************************************/
 377 SpeedControlWidget::SpeedControlWidget( intf_thread_t *_p_i, QWidget *_parent )
 378                     : QFrame( _parent ), p_intf( _p_i )
 379 {
 380     QSizePolicy sizePolicy( QSizePolicy::Maximum, QSizePolicy::Fixed );
 381     sizePolicy.setHorizontalStretch( 0 );
 382     sizePolicy.setVerticalStretch( 0 );
 383
 384     speedSlider = new QSlider( this );
 385     speedSlider->setSizePolicy( sizePolicy );
 386     speedSlider->setMaximumSize( QSize( 80, 200 ) );
 387     speedSlider->setOrientation( Qt::Vertical );
 388     speedSlider->setTickPosition( QSlider::TicksRight );
 389
 390     speedSlider->setRange( -34, 34 );
 391     speedSlider->setSingleStep( 1 );
 392     speedSlider->setPageStep( 1 );
 393     speedSlider->setTickInterval( 17 );
 394
 395     CONNECT( speedSlider, valueChanged( int ), this, updateRate( int ) );
 396
 397     QToolButton *normalSpeedButton = new QToolButton( this );
 398     normalSpeedButton->setMaximumSize( QSize( 26, 20 ) );
 399     normalSpeedButton->setAutoRaise( true );
 400     normalSpeedButton->setText( "1x" );
 401     normalSpeedButton->setToolTip( qtr( "Revert to normal play speed" ) );
 402
 403     CONNECT( normalSpeedButton, clicked(), this, resetRate() );
 404
 405     QVBoxLayout *speedControlLayout = new QVBoxLayout( this );
 406     speedControlLayout->setContentsMargins( 4, 4, 4, 4 );
 407     speedControlLayout->setSpacing( 4 );
 408     speedControlLayout->addWidget( speedSlider );
 409     speedControlLayout->addWidget( normalSpeedButton );
 410
 411     lastValue = 0;
 412
 413     activateOnState();
 414 }
 415
 416 void SpeedControlWidget::activateOnState()
 417 {
 418     speedSlider->setEnabled( THEMIM->getIM()->hasInput() );
 419 }
 420
 421 void SpeedControlWidget::updateControls( float rate )
 422 {
 423     if( speedSlider->isSliderDown() )
 424     {
 425         //We don't want to change anything if the user is using the slider
 426         return;
 427     }
 428
 429     double value = 17 * log( rate ) / log( 2. );
 430     int sliderValue = (int) ( ( value > 0 ) ? value + .5 : value - .5 );
 431
 432     if( sliderValue < speedSlider->minimum() )
 433     {
 434         sliderValue = speedSlider->minimum();
 435     }
 436     else if( sliderValue > speedSlider->maximum() )
 437     {
 438         sliderValue = speedSlider->maximum();
 439     }
 440     lastValue = sliderValue;
 441
 442     speedSlider->setValue( sliderValue );
 443 }
 444
 445 void SpeedControlWidget::updateRate( int sliderValue )
 446 {
 447     if( sliderValue == lastValue )
 448         return;
 449
 450     double speed = pow( 2, (double)sliderValue / 17 );
 451     int rate = INPUT_RATE_DEFAULT / speed;
 452
 453     THEMIM->getIM()->setRate(rate);
 454 }
 455
 456 void SpeedControlWidget::resetRate()
 457 {
 458     THEMIM->getIM()->setRate( INPUT_RATE_DEFAULT );
 459 }
 460
 461 CoverArtLabel::CoverArtLabel( QWidget *parent, intf_thread_t *_p_i )
 462               : QLabel( parent ), p_intf( _p_i )
 463 {
 464     setContextMenuPolicy( Qt::ActionsContextMenu );
 465     CONNECT( this, updateRequested(), this, askForUpdate() );
 466
 467     setMinimumHeight( 128 );
 468     setMinimumWidth( 128 );
 469     setMaximumHeight( 128 );
 470     setMaximumWidth( 128 );
 471     setScaledContents( false );
 472     setAlignment( Qt::AlignCenter );
 473
 474     QList< QAction* > artActions = actions();
 475     QAction *action = new QAction( qtr( "Download cover art" ), this );
 476     CONNECT( action, triggered(), this, askForUpdate() );
 477     addAction( action );
 478
 479     showArtUpdate( "" );
 480 }
 481
 482 CoverArtLabel::~CoverArtLabel()
 483 {
 484     QList< QAction* > artActions = actions();
 485     foreach( QAction *act, artActions )
 486         removeAction( act );
 487 }
 488
 489 void CoverArtLabel::showArtUpdate( const QString& url )
 490 {
 491     QPixmap pix;
 492     if( !url.isEmpty() && pix.load( url ) )
 493     {
 494         pix = pix.scaled( maximumWidth(), maximumHeight(),
 495                           Qt::KeepAspectRatioByExpanding,
 496                           Qt::SmoothTransformation );
 497     }
 498     else
 499     {
 500         pix = QPixmap( ":/noart.png" );
 501     }
 502     setPixmap( pix );
 503 }
 504
 505 void CoverArtLabel::askForUpdate()
 506 {
 507     THEMIM->getIM()->requestArtUpdate();
 508 }
 509
 510 TimeLabel::TimeLabel( intf_thread_t *_p_intf  )
 511     : QLabel(), p_intf( _p_intf ), bufTimer( new QTimer(this) ),
 512       buffering( false ), showBuffering(false), bufVal( -1 )
 513 {
 514     b_remainingTime = false;
 515     setText( " --:--/--:-- " );
 516     setAlignment( Qt::AlignRight | Qt::AlignVCenter );
 517     setToolTip( QString( "- " )
 518         + qtr( "Click to toggle between elapsed and remaining time" )
 519         + QString( "\n- " )
 520         + qtr( "Double click to jump to a chosen time position" ) );
 521     bufTimer->setSingleShot( true );
 522
 523     CONNECT( THEMIM->getIM(), positionUpdated( float, int64_t, int ),
 524               this, setDisplayPosition( float, int64_t, int ) );
 525     CONNECT( THEMIM->getIM(), cachingChanged( float ),
 526               this, updateBuffering( float ) );
 527     CONNECT( bufTimer, timeout(), this, updateBuffering() );
 528 }
 529
 530 void TimeLabel::setDisplayPosition( float pos, int64_t t, int length )
 531 {
 532     showBuffering = false;
 533     bufTimer->stop();
 534
 535     if( pos == -1.f )
 536     {
 537         setText( " --:--/--:-- " );
 538         return;
 539     }
 540
 541     int time = t / 1000000;
 542
 543     secstotimestr( psz_length, length );
 544     secstotimestr( psz_time, ( b_remainingTime && length ) ? length - time
 545                                                            : time );
 546
 547     QString timestr = QString( " %1%2/%3 " )
 548             .arg( QString( (b_remainingTime && length) ? "-" : "" ) )
 549             .arg( QString( psz_time ) )
 550             .arg( QString( ( !length && time ) ? "--:--" : psz_length ) );
 551
 552     setText( timestr );
 553
 554     cachedLength = length;
 555 }
 556
 557 void TimeLabel::setDisplayPosition( float pos )
 558 {
 559     if( pos == -1.f || cachedLength == 0 )
 560     {
 561         setText( " --:--/--:-- " );
 562         return;
 563     }
 564
 565     int time = pos * cachedLength;
 566     secstotimestr( psz_time,
 567                    ( b_remainingTime && cachedLength ?
 568                    cachedLength - time : time ) );
 569     QString timestr = QString( " %1%2/%3 " )
 570         .arg( QString( (b_remainingTime && cachedLength) ? "-" : "" ) )
 571         .arg( QString( psz_time ) )
 572         .arg( QString( ( !cachedLength && time ) ? "--:--" : psz_length ) );
 573
 574     setText( timestr );
 575 }
 576
 577
 578 void TimeLabel::toggleTimeDisplay()
 579 {
 580     b_remainingTime = !b_remainingTime;
 581 }
 582
 583
 584 void TimeLabel::updateBuffering( float _buffered )
 585 {
 586     bufVal = _buffered;
 587     if( !buffering || bufVal == 0 )
 588     {
 589         showBuffering = false;
 590         buffering = true;
 591         bufTimer->start(200);
 592     }
 593     else if( bufVal == 1 )
 594     {
 595         showBuffering = buffering = false;
 596         bufTimer->stop();
 597     }
 598     update();
 599 }
 600
 601 void TimeLabel::updateBuffering()
 602 {
 603     showBuffering = true;
 604     update();
 605 }
 606
 607 void TimeLabel::paintEvent( QPaintEvent* event )
 608 {
 609     if( showBuffering )
 610     {
 611         QRect r( rect() );
 612         r.setLeft( r.width() * bufVal );
 613         QPainter p( this );
 614         p.setOpacity( 0.4 );
 615         p.fillRect( r, palette().color( QPalette::Highlight ) );
 616     }
 617     QLabel::paintEvent( event );
 618 }